Title :
Design of robust H∞ PI controller for hydro turbine speed governor
Author :
Qinghai Heng ; Jing Lu ; Xiaoshan Lu ; Huan Cao
Author_Institution :
Sch. of Autom., Beijing Inf. Sci. & Technol. Univ., Beijing, China
Abstract :
This paper presents the design of the H∞ robust performance of a hydro turbine speed governor. It can be used to solve the H∞ robustness problems of the hydro turbine speed governor, which can´t be done by the conventional H∞ double-Loop robust performance designs. High frequency oscillation and large amplitude of output and control variable of the control system of the hydro turbine speed governor are exhibited by a conventional H∞ double-Loop robust performance design method. It is pointed out that the design of the robust performance of the hydro turbine speed governor can be formulated as an optimization H∞ mixed sensitivity method, if the uncertainty weighting function and the performance weighting function of the hydro turbine speed governor are revised appropriately. The selections of the weighting functions are studied and the optimization H∞ mixed sensitivity robust PI controllers of the hydro turbine speed governor are solved. The simulation results of the hydro turbine speed governor show that the proposed method is valid. The realization of the controllers doesn´t involve extra cost to the control equipment of the hydro turbine speed governor.
Keywords :
H∞ control; PI control; angular velocity control; control system synthesis; hydraulic turbines; robust control; H∞ double-loop robust performance design; H∞ robustness problem; controller design; hydro turbine speed governor; optimization H∞ mixed sensitivity method; performance weighting function; robust H∞ PI controller; uncertainty weighting function; Automation; Control systems; Electronic mail; Hydraulic turbines; Robust control; Robustness; Sensitivity; H∞ Mixed Sensitivity; Hydro Turbine Speed Governor; PI Controller;
Conference_Titel :
Control and Decision Conference (CCDC), 2015 27th Chinese
Conference_Location :
Qingdao
Print_ISBN :
978-1-4799-7016-2
DOI :
10.1109/CCDC.2015.7162307